On the topic of Doctor Who-inspired songs, I'd like to share with you all a link I recently found to "Doctor in Distress"...
http://tv.cream.org/specialassignments/themes/distress.mp3

Co-written by Ian Levine, who did the K9 & Company theme song, and owns at least one copy of every DC comic book ever sold at retail (or so he claims, at any rate).

You can read more about it (and other horrible Dr. Who tribute songs) here:
http://www.millenniumeffect.co.uk/audio/tributes/cares.html